Influence of oxygen content on the reduction of the ordering temperature of L10 FePtCu alloy

被引：4

作者：

Kikitsu, A ^{[1
]}

Maeda, T

Kai, T

Nagase, T

Akiyama, J

Fujioka, N

Ishigami, T

机构：

[1] Toshiba Co Ltd, Ctr Corp Res & Dev, Kanagawa 2128582, Japan

[2] Toshiba Co Ltd, Display Devices & Components Co, Yokohama, Kanagawa 2358522, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2003年 / 39卷 / 05期

关键词：

composite target; disorder-order transformation; Fe-Pt ordered alloy; ordering temperature; residual oxygen;

D O I：

10.1109/TMAG.2003.815574

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The influence of the residual oxygen on the ordering (transformation from fcc to fct) temperature of sputtered Fe-Pt-Cu films was investigated. Secondary ion mass spectroscopy analysis revealed that high oxygen content increases the onset temperature of the ordering process. The oxygen is brought into an Fe-Pt-Cu film during the deposition process and forms stable Fe-O compound. This might increase the ordering temperature as well as prevent the coalescence of grains, that is, the nucleation of phase transformation. A hot-pressed Fe-Pt composite target which contains oxygen of 50 ppm was developed. This target is also effective for reducing the ordering temperature of Fe-Pt films.

引用

页码：2720 / 2722

页数：3

共 9 条

[1] HIGH ANISOTROPY L1(0) THIN-FILMS FOR LONGITUDINAL RECORDING [J].

COFFEY, KR ;

PARKER, MA ;

HOWARD, JK .

IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) :2737-2739

[2] Effects of Ag underlayers on the microstructure and magnetic properties of epitaxial FePt thin films [J].

Hsu, YN ;

Jeong, S ;

Laughlin, DE ;

Lambeth, DN .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) :7068-7070

[3]

Ivanov O. A., 1973, PHYS MET METALLOGR, V35, P81

[4] Magnetic hardening mechanism study in FePt thin films [J].

Kuo, CM ;

Kuo, PC ;

Wu, HC ;

Yao, YD ;

Lin, CH .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :4886-4888

[5] MAGNETIC-PROPERTIES AND STRUCTURE OF FE/PT THIN-FILMS [J].

LUO, CP ;

SELLMYER, DJ .

IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) :2764-2766

[6] Reduction of ordering temperature of an FePt-ordered alloy by addition of Cu [J].

Maeda, T ;

Kai, T ;

Kikitsu, A ;

Nagase, T ;

Akiyama, J .

APPLIED PHYSICS LETTERS, 2002, 80 (12) :2147-2149

[7] Preparation of ordered Fe-Pt thin films for perpendicular magnetic recording media [J].

Suzuki, T ;

Harada, K ;

Honda, N ;

Ouchi, K .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 193 (1-3) :85-88

[8]

TAKAHASHI Y, 2002, 47 ANN C MAGN MAGN M, P224

[9] DIRECT FORMATION OF ORDERED COPT AND FEPT COMPOUND THIN-FILMS BY SPUTTERING [J].

VISOKAY, MR ;

SINCLAIR, R .

APPLIED PHYSICS LETTERS, 1995, 66 (13) :1692-1694

← 1 →